Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

2018 BugGuide Gathering in Virginia July 27-29: Registration and Discussion

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Species Porcellionides pruinosus

Woodlice - Porcellionides pruinosus Woodlice? - Porcellionides pruinosus Wood louse - Porcellionides pruinosus Porcellionides - Porcellionides pruinosus isopod? - Porcellionides pruinosus Woodlouse - Porcellionides pruinosus Woodlouse - Porcellionides pruinosus Powder blue isopod - Porcellionides pruinosus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Crustacea (Crustaceans)
Class Malacostraca (Malacostracans)
Superorder Peracarida (Peracarida (Amphipods and Isopods))
Order Isopoda (Isopods)
Suborder Oniscidea (Woodlice)
Infraorder Holoverticata
No Taxon (Orthogonopoda)
No Taxon (Crinocheta)
Family Porcellionidae
Genus Porcellionides
Species pruinosus (Porcellionides pruinosus)
Synonyms and other taxonomic changes
Explanation of Names
Author of species is Brandt 1833
10 subspecies (ITIS)
5-10 mm
External diagnostic features (Ferenc Vilisics's comments):
5-10 mm long (without antennae)
2-segmented flagellum
abdomen slender, visibly divides from thorax
color ranges from blue-violet to light orange
no patches or stripes, only subtle waxy grains that makes a "soft" look of surface
often in warm places, under rocks exposed to sun or inside compost heaps.
More diagnostic features here
Native to the Mediterranean, adventive elsewhere and now cosmopolitan(1) (map)
all anthropogenic habitats(1)
Works Cited
1.Checklist of the terrestrial isopods of the New World (Crustacea, Isopoda, Oniscidea)
Leistikow A., Wägele J.W. 1999. Rev. Bras. Zool. 16: 1-72.